Gundam

The Gundam Series first debuted in 1979 is a metaseries of anime created by Sunrise studios that features giant robots (or "mecha") called "Mobile Suits" (MS) usually controlled by a pilot; Gundam is a type of advanced, high-performance mobile suit often piloted by the protagonists in the series.

The Gundam shown in the ready player one trailer is called RX-78-2, it was developed by the Earth Federation during the one year war against the Principality of Zeon. The RX-78-2's pilot and the protagonist in Mobile Suit Gundam is Amuro Ray, a 16-year-old teenager.